package com.hmdp.utils;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.hmdp.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.LOGIN_USER_KEY;

@Component
public class RefreshTokenInterceptor implements HandlerInterceptor {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String token = request.getHeader("authorization");
        if (StrUtil.isBlank(token)) {
            return true;
        }
        String key = LOGIN_USER_KEY + token;
        //根据token取session
        Map<Object, Object> mp = stringRedisTemplate.opsForHash().entries(key);
        if (mp.isEmpty()) {
            return true;
        }
        UserDTO user = BeanUtil.fillBeanWithMap(mp, new UserDTO(), false);

        // 存在，保存用户信息到ThreadLocal
        UserHolder.saveUser(user);

        stringRedisTemplate.expire(key, 600, TimeUnit.MINUTES);
        // 放行
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        //移除
        UserHolder.removeUser();
    }
}
